The revered documentarian wades into unexplored territory with the US president and Xi Jinping’s relationship – and there is a moment so startling that it feels like pure comedy gold The revered documentarian wades into unexplored territory with the US president and Xi Jinping’s relationship – and there is a moment so startling that it feels like pure comedy gold I t’s not normal to view documentaries about international trade negotiations as light relief, but we are where we are. Clash of the